Connect with TRB

AN EXPERIMENTAL STUDY OF ELASTOPLASTIC DEFORMATION OF SHELLS

A study was conducted to explore the behavior of shells of simple form under plastic deformations and to verify theoretical relationships previously developed. The material of the test shells was Kh18N10T steel; the stress-strain characteristics are given. External pressure loading of the test specimens was applied by means of an NP-200 hand pump with a manometric device capable of being read to the nearest 5 kg/sq. cm. Deflections in the specimens were measured by the clock-type dial indicator with a scale division of 0.01 mm. The relative deformation curves plotted from the experimental data were found to be in qualitative agreement with the behavior predicted from a theoretical basis. Accounting for variations in the geometry of shells in the process of elasto-plastic deformation introduces appreciable adjustments in design and allows more realistic estimates of stress-strain behavior under external pressures.